Trolley-retriever.



'No. 769,085. PATENTED AUG. 30, 1904. W. W. HOFFMAN & P.'W. POWERS.

TROLLEY RETRIEVER, APPLICATION FILED 00T.19 1903.

3 SHEETS-SHEET 1.

NO MODEL.

A fzvl zizvroles a at complishing this end as distinguished from similarview to Fig. 1, showing an auxiliary through the winding-drum adjacentthe in- LAFAYETTE, INDIANA Patented August 30, 1904.

PATENT OFFIC WILLIAM W. HOFFMAN AND FRANCIS W. POWERS, OF WESTLAFAYETTE,

INDIANA, ASSIGNORS TO ELECTRIC &

STEAM RY. SUPPLY OO., OF

- "TROLLEY-R'ETRIEIVER.

SPECIFICATION forming part of Letters Patent No. 769,085, dated August30, 1904.

Application filed October 19, 1903.

To (all; whom it may concern/.

Be it known that we,'VJILLIAM W. HOFFMAN and FRANCIS W. Pownns, citizensof the'United States, both residing at West Lafayette, in the county ofTippecanoe and State of Indiana; have invented certain new and usefulImprovements in Trolley-Retrievers; and we do hereby declare thefollowing to bea full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

Our invention relates to improvements in trolley-retrievers, and isespecially designed to provide means to protect the overheadconstructions of trolley-lines when the trolley- Wheel jumps thetrolley-wire.

The object of our present invention is to provide a purely mechanicalmeans for acthat class of devices wherein theupward move ment of thetrolley is arrested by means of mechanism controlled by an electromagnetexcited by the current in the trolley-wire when the trolley-wheel leavesthe wire. 7

Other advantages and features of novelty will hereinafter more fullyappear, and to more clearly understand our invention reference is had tothe accompanying drawings, illustrating the same, wherein likecharacters designate like parts in the several views, and in whichFigure 1 represents a frontelevation of the assembled device, the frontplate for the casing and the upright support for the central spindlebeing omitted and a portion of the winding-reel cut' away to show theinterior mechanism more clearly. Fig. 2 is a vertical transverse sectionon the lines 2 2 of Fig. 1. Fig. 3 is a detail view of the rotaryclutchplate mounted adjacent the winding-drum, showing the location ofthe pivoted dogs carried by the winding-drum with respect to theclutch-plate and a part of the Clutch-platebeing broken away. Fig. 45 isa substantially automatic locking device between the clutchd1sk andwinding-drum, asectlon being taken Serial No. 177,694. (No model.)

ner disk K; and Fig. 5 is a fragmentary detail sectional view of the topportion of the 'mechanism on the line L A of Fig. 4.

A represents a box or casing, preferably constructed of metal and ofsuch dimensions as to be readily removable to either end of the car.

B is a central spindle supported at one end in the rear of the casingand at its other end by an upright support. or bracket B in any suitablemanner, such as by means of the screw 6. O is a hub or sleeverotatablysupported on said spindle B and provided with the annular disk D,-preferably formed integral therewith; This disk D, as illustrated inFig. 2, is provided at its outer end with an inwardly-extending enlargedportion D therearound, forming an annular recess D", and extendingupwardly at right angles from this enlarged portion is an annular flangeD 7 On the inner face of the enlarged annular portion D and extendinginwardly into the recess D are a plurality of circumferentiallydisposedratchet-teeth (Z. On the inner face of the annular flange D is located alug E,

and adjacent said lug and forming a continuation of the circumferentialface, of the flange D is a projecting tooth or lug E.

F designates a catch or dog located at the upper end of the clutch-diskD in the space formed by the annular flange D and the enlarged portionD. This catch or dog F is pivotally supported by means of the shaft fpassing through an aperture in the annular flange D the other end of theshaft f, carrying an arm f, provided with the transverselydi'sposed armor lever F, adapted to project above the winding-drum in the path of theby any suitable means. In the drawings we have illustrated this by afiat metallic spring f fastened at one end, as by a screw,to the outersurface of the enlarged portion D and extending at its other end beneaththe catch or dog F.

Located between the clutch-disk D and the rear face of the casing is amotor-spring G of a strength suificient to overcome the tension of thesprings controlling the trolley-pole. This spring Gr surrounds the innerend of the hub or sleeve O, being secured thereto at one end in anysuitable manneras at Gr, for instance-by being hooked into a grooveformed in the sleeve, and the other end of the spring is suitablysecured to a stationary supportas, for instance, to the abutment H,formed integral with the casing A. The outward play of the spring islimited by the abutments H, H, H and H all of which are suitably securedto and project inwardly from the sides of the casing.

I designates the winding drum for the trolley-rope, and comprises theannular side plates K K and the transverse portion K This drum isrotatably supported on and movable independently of the hub or sleeve C,the side wall K being disposed immediately adjacent to the annularrecess D, and forming therewith a closed chamber for the reception ofoperating-clogs carried by the drum, adapted to become engaged at theproper moment with the internal ratchet-teeth d. These dogs J arepivotally supported on the plate K of the drum by means of thepivot-screws j therethrough and are provided on their outer surface withthe projecting teeth J in proximity to the internal ratchet-teeth d ofthe ratchet-disk.

. lating the movement of the pivoted dogs. In

the drawings I have illustrated these adjustable springs as comprising acurved fiat piece of resilient metal j, engaging at one end the upperface of the pivoted dogs and at its other end adjustably secured, bymeans of the screws f to'the supporting blocks or projections J suitablysecured to the outer face of the annular disk K of the drum. Theseblocks or projections may preferably be formed integral with the drumand are preferably so disposed, as shown in Fig. 3, to serve as stops,engaging the free ends of the pivoted dogs and limiting the inward playof the same.

Within the drum I is located a light disk L, resting against the ribs Z,which forms a chamber or casing with the side plate K of the drum,within which is located a suitable flat coil-spring M, connected at oneend in any suitable manner to the hub or sleeve C,

as at m, and at its other end to the inner face the trolley-rope N,which is suitably secured thereto for retaining the trolley-rope taut,but not strong enough to overcome the tension of the springs operatingthe trolleyqmlc, so that the action of the drum will atall times take upthe slack of the trolley-rope, but will allow the rope to pay out tosuit the variations in the height of the trolley-wire.

O is a detent-bar provided at its forward end with thedownwardly-projecting tooth or detent O and at its rear end with theprejection or tooth 0 so formed thereon as to be located. out of thepath of the projecting tooth E, but in the path of the pivoted dog orcatch F. On the forward end of the detentbar is formed an offset 0provided with a transverse pin or lug 0", and this offset is locatedadjacent the projecting shoulder ll on the abutment H, the downwardmovement of the offset being limited by the transverselydisposed pin 0",projecting from the shoulder H beneath the offset 0".

P is a transversely disposed abutment, preferably formed integral withthe upper inside face of the casing and adapted to be engaged by theoffset O of the detent-arm at theproper time. The rear enlarged portionof the detent-bar O is slotted, as at O", and, pivotally supported bymeans of the pivotscrew 1- passes through a bracket It on one side ofthe detent-bar, through the slot 0', and screwing at its inner end intoa post R, projecting from the rear side of the casing, the post R beingreinforced by the depending web '1', which joins it to the top of thecasing.

Between the detent-bar and the inner faces of the post R and the bracketR are interposed the friction-washers '1", of any suitable material,such as rubber, or the like. (Shown in Figs. 1 and 4.) Thesefriction-washers allow the longitudinal movement of the detentbar 0, butretard its movement to a certain extent, and this may be furtherregulated by tightening or loosening the screw r.

We provide means at the forward end of the detent-bar normally tendingto press the same upwardly, and in the drawings we have illustrated thismeans as comprising a resilient metallic strip Q, adjustably securedatone end to the casing by the screw 1 and at its other end adapted toproject beneath the transverse pin 0 on the offset 0.

a designates a handle on the top of the easing, and a a hook under whichthe trolleyrope maybe passed to hold it firmly when the casing is beingshifted from one end of the car to the other.

It will be obvious that duplicate mechanism might be arranged on theforward and rear ends of the car and secured firmly thereto; but inpractical operation for the sake of cheapness it is preferable that thecasing and mechanism be made portable, as described, and provided withsuitable locking means whereby it may be easily and quickly attached toor detached from the car proper. To accom-' pli'sh this end, we haveshown ametal frame,

preferably triangular in shape, as indicated at 1, adapted to be securedto the dashboard of a car by the bolts 2, and at the bottom of thistriangular frame are located the upwardly extending hooks 3, which areadapted to project into holes provided .in the bottom of the portablecasing. r.

At thetop of the frame 1 is provided an in wardly-projecting shoulder 4,to the inner face the drum 1 for locking said disk'and drum togethershould the pivoted dogs J by any means become. disengaged from theratchetteeth (Z, while thewinding mechanism isreleased with respect tothe detent on the detent-bar, before described. For this purpose weprovide a pawl N, having a'suitablyshaped upwardly projecti'ng lug l 2and a'tail memher N which pawl ispivotally supported 'on a stud N",projecting outwardly from the flanged portion D Theupwardly-projectinglugN is disposed alongside of the projecting tooth- Eon the flange D and for this purpose in this construction the projectingtooth E might simply be an angularly-raised portion on thecircumferential surface of thefiange. It will be observed that the inner:faceof the lug N' is normally held in engagement-with the detent O bymeans of a suitable spring 42, secured to the flange Di and projectingbeneath the tailpiece N", and while-in this position the pawl member lis held out of engagement with, but disposed immediatelyrabove, theinner disk K of thewinding-dru-ml, theperiph cry of this disk beingprovided'with a plurality of notches N", disposed therearound.

The operation of the mechanism is as follows: The drum I, beinglooselymounted on the sleeve or hub O-and being actuated by the coil-spring M,revolves to take up the slack of the trolley-rope, the strength of thespring M being sufiicient' for this purpose, butinsufficient for holdingthe drum I against ro tation in the opposite direction when the trolleypole rises to conform with the variations in height'of the trolley-wire,so that the trolleyrope by this construction is -normally held taut.When, however, the trolley leaves the wire it springsrforward with greatforce and starting to unwind the drum-I rapidly .with'a jerk throwsthe-dogs JCdownwardly against the tension. of the springs j, and theteeth J thereon being thrown outwardly into the path 'bar down.

oftheratchet-teeth dot the clutch-disk 1) win jar the disk D backwardlysufliciently to allow the action of the spring Q to move the forward endof the detent-bar O upwardly, thereby withdrawing'the detent or tooth 0out of engagement with the tooth E on the clutchspring G willimmediately rotate the clutchdisk D forwardly, and the clutch-disk beingnow locked to the winding-drum I by the interposed pivoted'dogs J thetrolley-rope will be wound thereon, bringing the trolley-pole downwardlyand out of reach of the overhead During the initial rotation of thecross-wires; clutch-disk D the lever-arm F, being disposed transverselyof the w1nd1ng-drum,-1s engaged disk, whereupon the action of the strongcoil j by the trolley-rope and swungdownwardly to a position relativelyto the drum corresponding to the position indicated by the dotted'linesin I Fig. 1,s0 that the arm F will rest on the periphery K of the drumand the conti'nuedrotation of the drum will wind the rope on the drumover I the arm F, lying transversely thereon. The f dogF is also moveddownwardly and out of the 'path of the tooth O on the detent-bar. T 0set --the mechanism again, the trolley-rope is pulled 1upwardly,thesprings controlling the trolleypole-assisting theoperatiomand the rope being unwound from the drum will release thelever-arm F, which will then spring upwardly by the action of the spring7,- its upward movement being limited by the lock or stop E. The dog Fhaving thus assumed its nor mal position Wlll upon a further rearward'ro- "tation of the clutch-disk engage the innerface of the tooth 0thus. inwardly moving the forward end of the detent-bar downwardly,

thence sliding the detent-bar rearwardly-as far as permitted by'theslotO, in which posr tion the oifset O is moved beneath the abutment P,holding the forward'end of the detent- The manual pull'on the rope beingthen released, the strong spring G will overs come'the tension of thesprings on the trolleypole and again rotate the winding mechanismforwardly until the toothE engages the detent-O", which is now held inthe path of the tooth E, andthe continued forward rotation ofthe'clutch-disk 'D forces the detentbar 0 forwardly as far as the slotOtwill per mit, which is its normal'position, as shown in the'drawings.A slight pull down on the trolley-rope when the mechanismv 1 in thisposition will allow the winding-drum to ro* tate forwardly a sufficientdistance to bring the teeth J beyond thepoint of the ratchetteeth' (Z,when the action of the springs will again-move the pivoted dogs J intotheir normalposition. The friction-washers r will &

under the hook a on the top of the casing, thus locking the winding-drumagainst movement, and the tension of the trolley-spring on the trolleypole will help to support the weight of the mechanism while being moved.

The operation of the modified mechanism shown in Figs. 4 and 5 issubstantially similar, as heretofore described, except that at the sametime the tooth E is disengaged from the detent O the lug N is alsoreleased and the pawl member N is pressed down and rests on the cut-awayface a of the drum-disk K by the action of the spring a thereon. hen thepawl is in this position, it is obvious that if the pivoted dogs Jshould become disengaged from the ratchet-teeth d the pawl member Nwould immediately lock the clutchdisk and winding-drum by being broughtinto engagement with the nearest notch N of the drum-disk K. Also whenthe mechanism is being reset and the detent-bar O has been moveddownwardly and backwardly by the lug F engaging the tooth O the forwardend being now held beneath the projecting bar I, as before described,when the clutch-disk is rotated forwardly, the parts being in thisposition, the forward end of the lug N is en gaged by the detent O andthe auxiliary pawl is raised upwardly toward its normal position untilthe tooth E also engages the detent O and the mechanism is thus reset.

It will be understood that we do not wish to limit ourselves to theexact details as illustrated and described, as it is obvious that manymodifications might be made in actual construction without departingfrom the spirit of our invention; but

What we claim is 1. In trolley-retrieving mechanism,the combination withoperative means connected to the trolley-rope, supplemental movablemeans normally held against movement, and driving mechanism for saidfirst-mentioned operative and supplemental means, of a locking devicefor said supplemental means, means for automatically locking saidfirst-mentioned operative means and supplemental means and releasingsaid locking device upon the sudden upward movement of the trolley-pole,and auxiliary locking means automatically set upon the release of saidsupplemental means and adapted to lock together said first-mentionedoperative and supplemental means upon the accidental displacement ofsaid main locking means.

2. In trolley-retrieving mechanism,the combination with operative meansconnected to the trolley rope, supplemental movable means normally heldagainst movement and driving mechanism for said first-mentionedoperative and supplemental means, of a locking device for saidsupplemental means, mechanicallyoperated means for automatically lockingsaid first-mentioned operative means and supplemental means andreleasing said locking device upon the sudden upward movement of thetrolley-pole, and auxiliary locking means automatically set upon therelease of said supplemental means and adapted to lock together saidfirst-mentioned operative and su pplemental means upon the accidentaldisplacement of said main locking means.

3. In trolley-retrieving mechanism, the combination with a winding-d rumconnected to the trolley-rope, rotary means normally locked againstmovement and driving mechanism for said winding-drum and rotary means,of a. locking device for said rotary means, means for automaticallylocking said drum and rotary means and releasing said locking deviceupon the sudden upward movement of the trolley-pole, and auxiliarylocking means antomatically set upon the release of said rotary meansand adapted to lock together said drum and rotary means upon theaccidental displacement of said main automatic locking means.

4%. In trolley-retrievingmechanism,thecombination with operative meansconnected to the trolley-rope, supplemental movable means normally heldagainst movement, and driving mechanism for said first-mentionedoperative and supplemental means, of a locking device for saidsupplemental means, means for antomatically locking said1irst-mentionedoperative means and simplemental means and releasing saidlocking device upon the sudden upward movement of the trolley-pole, andauxiliary locking means automatically set upon the release of saidsupplemental means and adapted to loclt together said iirst-mentionedoperative and supplemental means upon the accidental displaeementof saidmain leeking means, comprising a pawl pivotally mounted on saidsupplemental means and adapted to be brought into locking engagementwith said first-mentioned operative means.

5. In trolley-retrieving mechanism, the combination with operative meansconnected to the trolley-rope, supplemental means normally held againstmovement and driving 111echanism for said first-mentioned operative andsupplemental means, of a locking device for said supplemental means,mechanically-operated means for automatically locking saidfirstmentioned operative means and supplemental means and releasing saidlocking device upon the sudden upward movement of the trolleypole, andauxiliary locking means automatically set upon the release of saidsupplemental means and adapted to lock together said first-mentionedoperative and supplemental means upon the accidental displacement ofsaid main locking means, comprising a pawl pivotally mounted on saidsupplemental means and adapted to be brought into locking engagementwith said first-mentioned operative means.

6. In trolley-retrievingmechanism,thecom bination with a wind ing-drumconnected to the trolley-rope, rotary means normally locked I againstmovement and driving mechanism for said winding-drum and rotary means,of a' locking device for said rotary means, means :forautomaticallylocking said drum and rotary means and releasing said locking deviceupon the sudden upward movement of the trolley-pole, and auxiliarylocking means antomatically set upon the release of said rotary meansand adapted to lock together said drum and rotary means upon theaccidental displacement of said main automatic locking means,,comprisingapawl pivotally mountedon said rotary means and adapted to be broughtinto 'locking engagement with said winding-drum.

7. In trolley-retrieving mechanism, the combination with means connectedto and cooperating with the trolley-rope for normally holding said ropetaut, of movable means, pro-- vided: with ratchet-teeth, normally lockedagainst movement, driving mechanism there' for of suflicient power toovercome, when released, the upward tension on the trolleyi pole, alocking device for said movable means,

means for automatically locking said firstmentioned and movable meansand releasing said locking device, comprising interposed pivoted dogscarried by said first-mentioned means and adapted to be thrown intoengagement with said ratchet-teeth upon the sudden upward movement ofthe trolley-pole, and

means automatically set upon the release of said movable means andadapted to lock said first-mentioned means and movable means togetherupon the accidental displacement of said pivoted dogs when in theirlocked position. I I

8. In trolley-retrieving mechanism,the combination with'a winding-drumconnected to the trolley-rope and means cooperating there'- with fornormally holding said trolley-rope taut, of rotary means, provided withratchetteeth, normally locked against movement,

driving mechanism therefor of suflicient power .to overcome, whenreleased, the upward tenoted dogs when in their locked position'.

- 9. Introlley-retrievingmechanism,the combination wlth means connectedto and cooperating with the trolley-rope for normally holding saidtrolley-rope taut,of a ro-' tatably-supported disk, provided with aplurality of circumferentially-disposed ratchet- "teeth, normally-lockedagainstrotation, driv-.

ment of said locked position.

- ing mechanism therefor of suflicient power to overcome, when released,the upward tension on the trolley-pole, a locking device for said rotarydisk, means for, automatically locking said first-mentioned means androtary ,disk and releasing said locking device, comprising interposedpivoted dogs carried by'said firstmentioned means adapted to be'throwninto engagement with said ratchet-teeth upon the sudden upward movementof the trolley-pole, and auxiliary means automatically set upon therelease of said rotary disk and adapted to lock said first-mentionedmeans and rotary disk together upon the accidental displacepivoted dogswhen in their 10. In trolley-retrieving mechanism, the combination withmeans connected to and c0- operating with the trolley-rope for normallyholding said trolley-rope taut, ofa rotary support provided with aplurality of circumferentially disposed inwardlyextending ratchetteeth,normally locked against rotation,'driving mechanism therefor ofsuflicient power to overcome, when released, the upward tension on thetrolley-pole, a locking device for said rotary support, means forautomaticallylocking said first-mentioned means and rotary support andreleasing said locking device, comprising interposed pivoted dogscarried by I said first-mentioned means and adapted to be thrown intoengagement with said ratchetteeth upon the sudden upward movement'of thetrolley-pole, and auxiliarymeans automatically set upon the release ofsaid rotary support and adapted to locksaid first-mentioned means androtary support together upon the accidental displacement of said pivoteddogs when in their locked position.

11. In trolley-retrieving mechanism, the

combination with a winding-drum connected. 7 to the trolley-rope andmeans cooperating with said drum for normally holding said trolley- Irope taut, of a rotatably-supported disk, provided with a plurality ofcircumferentiallydisposed ratchet-teeth normally locked againstrotation, driving mechanism therefor of sulfi cient power toovercome,when released, the

upward tension on the trolley-pole, a locking device for said rotarydisk, means, for automatically locking said drum and rotary disk andreleasing said locking device, comprising interposed pivoted dogscarried by said drum adapted to be thrown into engagement with saidratchet-teeth upon the sudden upward movementof the trolley-pole, andauxiliary means automatically set upon the release of a said rotary diskand adapted to lock said winding-drum and rotary disk together upontheaccidental displacement of said pivoted dogs when in their lockedposition.

12.1n trolley-retrieving mechanism, the

, combination with a winding drum connected 'to the trolley-rope andmeans cooperating with said drum for normally holding said ropetaut,

of a rotatably-supported disk normally locked against rotation, providedwith an inwardlyextending annular enlarged portion, a plurality ofinternal ratchet-teeth formed on said enlarged portion, drivingmechanism for said rotary disk of sufiicient power to overcome, whenreleased, the upward tension on the trolley-pole, a locking device forsaid rotary disk, means for automatically locking said drum and rotarydisk and releasing said locking device, comprising interposed pivoteddogs carried by said drum and adapted to be thrown outwardly intoengagement with said internal ratchet-teeth upon the sudden upwardmovement of the trolley-pole, and auxiliary means automatically set uponthe release of said rotary disk and adapted to lock saidwinding-drum androtary disk together upon the accidental displacement of said pivoteddogs when in their locked position.

13. In trolley-retrieving mechanism, the combination with meansconnected to and cooperating with the trolley-rope for normally holdingsaid rope taut, of movable means, provided with ratchet-teeth, normallylocked against movement, driving mechanism there for of suflicient powerto overcome, when re leased, the upward tension on the trolleypole, alocking device for said movable means, means for automatically lockingsaid firstmentioned and movable means and releasing said locking device,comprising interposed pivoted dogs carried by said first-mentioned meansand adapted to be thrown into engagement with said ratchet-teeth uponthe sudden upward movement ofv the trolley-pole, and means automaticallyset upon the release of said movable means and adapted to lock saidfirst-mentioned means and movable means together upon the accidentaldisplacement of said pivoted dogs when in their locked position,comprising a spring-operated dog pivotally supported on said movablemeans adjacent said first-mentioned means.

14:. In trolley-retrieving mechanism, the combination with thewinding-drum, of rotary means, provided with ratchet-teeth, normallylocked against movement, means normally tending to rotate said drum androtary means, a locking device for said rotary means, means forautomatically locking said drum and rotary means and releasing saidlocking device, comprising interposed pivoted dogs carried by said drumand adapted to be thrown into engagement with said ratchet-teeth uponthe sudden upward movement of the trolley-pole, and auxiliary meansautomatically set upon the release of said rotary means and adapted tolock said winding-drum and rotary means together upon the accidentaldisplacement of said pivoted dogs when in their locked position,comprising a spring-operated dog pivotally supported on said rotarymeans adjacent said winding-drum.

15. In trolley-retrieving mechanism, the

combination with means connected to and cooperating with thetrolley-rope tor normally holding said trolley-rope taut, of arotatabtvsupported disk, provided with a plurality ofcircnmferentially-disposed ratchet-teeth,normally locked againstrotation, driving mechanism for said disk, a locking device for saidrotary disk, interposed pivoted dogs carried by said first-mentionedmeans adapted to be thrown into engagement with said ratchetteeth uponthe sudden upward movement of the trolley-pole, and auxiliary meansautomatically set upon the release of said rotary disk and adapted tolock said first-mentioned means and rotary disk together upon theaccidental displacement of said pivoted dogs when in their lockedposition, comprising a springoperated dog pivotally supported on saidrotary disk adjacent said firstanentionial means.

16. In trolley-retrieving mechanism, the combination with meansconnected to and cooperating with the trolley-rope for normally holdingsaid trolley-rope taut, of arotary support provided with a plurality ofcircumferentially-disposed inwardl y-extendin g ratchetteeth, normallylocked against rotation, driving mechanism for said rotary support, alocking device for said rotary support, interposed pivoted dogs carriedby said first-mentioned means and adapted to be thrown into engagementwith said ratchet-teeth upon the sudden upward movement of thetrolley-pole, and auxiliary means automatically set upon the release ofsaid rotary support and adapted to lock said first-mentioned means androtary su pport together upon the accidental disphu-ement of saidpivoted dogs when in their locked position, comprising a spring-operateddog pivotally supported on said rotary support adjacent saidfirst-mentioncd means.

17. In trolley-retrieving mechanism, the combination with thewinding-drum, of a retatably-supported disk, provided with a pluralityof circumferentially-disposed ratchetteeth normally locked againstrotation, drivingmeehanism for said drum and rotary disk, a lockingdevice for said rotary disk, interposed pivoted dogs carried by saiddrum adapted to be thrown into engagement with said ratchet-teeth uponthe sudden upward movement of the trolley-pole, and auxiliary meansautomatically set upon the release of said rotary disk and adapted tolock said windingdrum and rotary disk together upon th 3 accidentaldisplacement of said pivoted dogs when in their locked position,comprising a springoperated dog pivotally supported on said rotary diskadjacent said winding-drum.

18. In trolley-retrieving mechanism, the combination with thewiiuling-drum, o l a. rotatably-supported disk normally locked againstrotation, provided with an inwardly-extending annular enlarged portion,a plurality of internal ratchet-teeth "formed on said enlarged portion,driving mechanism for said drum and rotary disk, a locking device forsaid rotary disk, interposed pivoted dogs carried by said drum andadapted to be thrown outwardly into engagement with said internalratchet-teeth a longitudinally-movable detent normally engaging saidrotary support, and mechanicallyoperated means for automatically lockingsaid drum and rotary support and releasing said detent upon the suddenupward movement of the trolley-pole.

20. In trolley-retrieving mechanism, the combination with thewinding-drum, a normally-locked rotary support and means tending torotate said drum and rotary support, of a longitudinally-movable pivoteddetent normally engaging said rotary support, means for exerting upwardpressure on said detent, and 1nechanically-operated means-forsimultaneously locking said drum and rotary support and releasing saiddetent upon the sudden upward'movement-of the trolley-pole.

21; In trolley-retrieving mechanism, the combination with thewinding-drum, a normally locked rotary support, and means tending torotate said drum and rotary support, ofa tooth on said rotary support, alongitudinally-movable pivoted detent normally engaging said tooth,means exerting upward'pressure on said detent, and mechanically-operatedmeans for simultaneously locking said drum and rotary support andI'GlGELSlIlgSEUClCl6i3811i3.- 22. In trolley; retr evi ng mechanism, the

combination with the winding dr ufniff nor mally locked rotary support,and means tending to rotate said drum and rotary support, of alongitudinally-movable detent normally engaging said rotary support,friction members engaging said detent for controlling its longitudinalmovement, and means for automatically locking said drumand rotarysupport and releasing said detent upon the sudden upward movement of thetrolley-pole.

28. In trolley-retrieving mechanism, the combination with thewindingdrum, nor mally locked rotary support, and means tending torotate said drum and rotary support, of a longitudinally-movablepivoteddetent nor mally engaging said rotary support, frictionwashersengaging said detent for controlling its longitudinal movement,,meansfor exerting upward pressure on said detent, and means forsimultaneously locking said drumand rotary support and releasingsaiddetent upon the sudden upward movement of the trolley p0 e. Y

24:. In trolleyretrieving mechanism, the combination with the drum, anormally locked rotatably-mounted support, and means tending to rotatesaid drum and rotary support,of a detent-bar capable of longitudinal andvertical movement, provided with a toothat its rear end and a detent atits forward end normally engaging said rotary support, means normallytending to unlock said detent from said drum, means for simultaneouslylocking said drum and rotary support and releasing said detent upon thesudden upward movement of thetrolley-pole, and means carried by saidrotary support for engaging said rear tooth at a predetermined point of,said rotary supports rearward rotation for resetting said detent.

25. In trolley-retrieving mechanism,- the combination with the drum,rotary support, and means for rotating and interlocking same, ofa-detentcapable of longitudinal and vertical movement, normally engaging saidrotary support, and means adapted to engage said detent at apredetermined point of the rearward rotation of said rotary support,when resetting, comprising a dog pivotally mounted on said rotarysupport, and provided with an arm extending transversely of said drum.

26. In trolley-retrieving mechanism, the

combination with'the drum, a normally lockedheld out of engagement withsaid rear tooth of said detent-bar during the forward rotation of saidrotary support, but adapted to project upwardly and engage said reartooth at a predetermined point of said rotary supports rearwardrotation.

27. In trolley retrieving mechanism, the combination with the drum, anormally locked rotatably-mounted support and means tending to rotatesaid drum and rotary support, of a detent-bar capable of longitudinaland vertiv cal movement provided with a tooth at its rear end and adetent at its forward end normally engaging said rotary support, meansexerting "upward pressure on the forward end of said detent-bar,mechanically-operated means for simultaneously lockingsaid drum androtary support and releasing said detent upon the sudden upward movementof the trolley-pole,

and means adapted to engage the rear tooth I of said detent-bar at apredetermined point of the rearward rotation of said rotary support,comprising a dog pivotally mounted on said rotary support and providedwith an arm extending transversely across said windingdrum.

28. In trolley-retrieving mechanism, the combination with thewinding-drum, a normally locked rotatably-mounted support and meanstending to rotate said drum and rotary support, of a tooth on saidrotary support, a pivoted detent-bar provided with a detent normallyengaging said tooth, means exerting upward pressure on the free end ofsaid detentbar, mechanically-operated means for locking said drum androtary support and releasing said detent upon the sudden upward movementof the trolley-pole, and an auxiliary locking means for said drum androtary support, comprising a spring-operated pivoted pawl, carried bysaid support adjacent said winding drum, and provided with anupwardly-extending lug adapted to normally engage said detent.

29. In trolley-retrieving mechanism, the combination with arotatably-supported drum connected to the trolley-rope, and means foractuating said drum, of a rotatably-supported disk adjacent said drum,driving mechanism connected to said disk of sufficient power toovercome, when released, the upward tension on the'trolley-pole, aplurality of ratchet-teeth formed on said disk, a locking-tooth formedon said disk, a detent-bar pivotally supported at its rear end andcapable of longitudinal movement, a detent carried by the forward end ofsaid detent-bar normally engaging said locking-tooth for locking saidrotary disk, a tooth formed on the rear end of said detentbar, meansexerting upward pressure on the forward end of said detent-bar, aspring-operated pivoted dog carried by said rotary disk, an arm fast tosaid pivoted dog and projecting transversely above said winding-drum,means for limiting the upward movement of said projecting arm, and meansfor automatically locking said drum and rotary disk and releasing saiddetent.

30. In trolley-retrieving mechanism, the combination with thewinding-drum, a rotatably-mounted support, and means for actuating saiddrum and support, of a detent-bar ically operated means forsimultaneously locking said drum and rotary support and releasing saiddetent upon the sudden upward movement of the trolley-pole.

31. In trolley-retrieving mechanism, the combination with a suitablecasing, of a windingdrum rotatably mounted therein and means foractuating said \vinding-drum, a rotatably-mounted support adjacent saidwinding-drum, a coil motor-spring connected to said rotary support,abutment-posts carried by said casing and extending transversely of saidmotor-spring for limiting its outward play, a pivoted detent normallyengaging said rotary support for locking the same against movement,means exerting upward pressure on said detent at its forward end, andmechanically-operated means for simultaneously locking said drum andreleasing said detent upon the sudden upward movement of thetrolley-pole.

32. In trolley-retrieving mechanism, the combination with a suitablecasing, formed with a central hollow shoulder extending therein from itsrear face, a fixed spindle mounted at one end within said hollowshoulder, an upright support disposed adjacent the front face of thecasing, supporting the other end of said spindle, a hub rotatablysupported on said spindle, a disk carried by said hub near one endthereof, a winding-drum loosely mounted on the other end of said hub,means so interposed between said drum and disk as to allow of theirindependent rotation relatively to each other, and means for lookingsaid drum and disk for conjointly rotating them upon the sudden upwardmovement of the trolley-pole.

33. In portable trolley-retrieving mechanism, the combination with atriangular frame, adapted to be carried on the front and rear of thecar, said frame provided at its base with upwardly-extending lugs and atits apex with a pivoted locking-lmtton, of a portable casing provided onits underneath sur ace with apertures adapted to register with saidlugs, a projection on the upper rear face of 'said easing adapted to beengaged by said lockingbutton, mechanism within said casing connected toand normally holding the trolleyrope taut, and mechanism coi'iperatingwith said trolley-rope-controlling mechanism, mechanically operated bythe sudden upward movement of said trolley-pole for retrieving saidtrolley-pole.

In testimony whereof we aiiix our signatures in presence of twowitnesses.

IVILLIAM HOFFh IAN. FRANCIS W. POIVERS. itnesses:

TILLIAM W. PADDOCK, Seem Snow.

